Question 85860
{{{(A+B)^2/(C+D)^2=(22B-300)/4CD}}}


{{{(A+B)^2=(C+D)^2(22B-300)/4CD}}} Multiply both sides by {{{(C+D)^2}}}



{{{A+B=0+-sqrt((C+D)^2(22B-300)/4CD)}}} Take the square root of both sides



{{{A=0+-sqrt((C+D)^2(22B-300)/4CD)-B}}} Subtract B from both sides